/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.util.internal;

/**
 * A Utility to Call the {@link System#load(String)} or {@link System#loadLibrary(String)}. Because
 * the {@link System#load(String)} and {@link System#loadLibrary(String)} are both CallerSensitive,
 * it will load the native library into its caller's {@link ClassLoader}. In OSGi environment, we
 * need this helper to delegate the calling to {@link System#load(String)} and it should be as
 * simple as possible. It will be injected into the native library's ClassLoader when it is
 * undefined. And therefore, when the defined new helper is invoked, the native library would be
 * loaded into the native library's ClassLoader, not the caller's ClassLoader.
 */
final class NativeLibraryUtil {

  /**
   * Delegate the calling to {@link System#load(String)} or {@link System#loadLibrary(String)}.
   *
   * @param libName - The native library path or name
   * @param absolute - Whether the native library will be loaded by path or by name
   */
  public static void loadLibrary(String libName, boolean absolute) {
    if (absolute) {
      System.load(libName);
    } else {
      System.loadLibrary(libName);
    }
  }

  private NativeLibraryUtil() {
    // Utility
  }
}
